The current literature is sometimes confusing concerning these small cancellation distinctions. The key thing to remember is that the philosophy espoused by small cancellation does not change in the constructions. The technology exists and there is now a general pattern to how the theory works. The difficulty, after the theory is developedPlease understand I am not trying to minimise the efforts of people who develop this theory, I am just talking in a “once the dust has settled” practical sense., is showing the existence of labellings that satisfy the various conditions. This is achieved in the work of Gromov [1]}, Arzhantseva–Delzant [2]} and Osajda [3]}.
